
.header{
    width: 100%;
   height: 44px;
   line-height: 44px;
   text-align: center;
  
}

.content{
    width: 100%;
    background-image: url(../imgs/advertisement-bg.jpg);
    background-repeat: no-repeat;
    background-size: 1280px;
    background-position: center top;

}
.count-down{
    width: 105px;
    height: 40px;
    background-color: #fff;
    border-radius: 20px;
    position: fixed;
    right: 15px;
    top: 60px;
    text-align: center;
    line-height: 40px;
    font-size: 14px;
}
.slogan{
    width: 100%;
    height: 64px;
    font-size: 48px;
    position: fixed;
    color: white;
    bottom: 55px;
    text-align: center;
    animation: slogan-down  3s;
}

@keyframes slogan-down{
    0%{
        transform: translateY(-100px);
        
        opacity: 0;  

    }
    50%{
        opacity: 0.5;  
        transform: rotate(360deg);
        
    }
    100%{
        opacity: 1;  
    
    }
}